18986363774 has 8 divisors (see below), whose sum is σ = 32548052208. Its totient is φ = 8137013040.

The previous prime is 18986363741. The next prime is 18986363783. The reversal of 18986363774 is 47736368981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×18986363774⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678084407 + ... + 678084434.

It is an arithmetic number, because the mean of its divisors is an integer number (4068506526).

Almost surely, 2^18986363774 is an apocalyptic number.

18986363774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18986363774 is a deficient number, since it is larger than the sum of its proper divisors (13561688434).

18986363774 is a wasteful number, since it uses less digits than its factorization.

18986363774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356168850.

The product of its digits is 36578304, while the sum is 62.

The spelling of 18986363774 in words is "eighteen billion, nine hundred eighty-six million, three hundred sixty-three thousand, seven hundred seventy-four".